Unfortunately, this is not as I have come to know aerodynamics in reality.ChrisE said:Actually, air resistance increase is determined by comparing the square of the velocity. For example, you double the speed you have 4 times more wind resistance.
Cars are a good indicator. All car makers want to claim a high top speed for their car. Especially sports car makers will go to length to make their cars aerodynamic, to achieve high top speeds.
A low-cost 100bhp sports car (or small family car) will be content to reach 200kph/120mph. Name one that does <100bhp and >200kph.
Now, what's the least power you've seen on a car reaching bouble, 400kph (240mph)? I will just state that this just doesn't happen under 800bhp. Or I'd like to see one example. Seriously, those 800+bhp cars are very aerodynamic to get 360+kph. And you'll agree that while rolling resistance at 200kph is a small factor compared to air drag, it's in fact closer to proportionate to speed. With increased power, and speeds, the rolling resistance become increasingly less significant, and air drag rules pretty much the whole game.
100>800bhp to not quite double top speed. That's 3rd power, or worse.
The Bugatti Veyron I believe tells very precisely how much power it is using. It could be used to make a reliable power to speed graph for that particular vehicle.
On a bike, you'd need to figure out a flat road, no wind, 100W velocity and then see what power it takes to double that velocity eed. My hunch is you'll see 25kph for 100W, maybe a bit more. Good luck getting a good reading at 50kph (solo). 400W will not cut it unless you're really tiny. For me (real tall and not skinny) 50kph is well above my (best shape) VO2max of 500+W.
To get rolling resistance out even more, ride 150W and take velocity. Then see what seed you get for 600W. Can you get double velocity?
